Plenty of people have expressed their dislike with the fact that Rihanna appears to have gotten back together with Chris Brown and Jay-Z is one of them. According to the British paper The Sun, Jay-Z has taken on the big brother role now that Rihanna has made the decision to re-unite with Chris Brown, who in 2009 was charged with felony assault after RiRi claimed he beat and bit her during an argument the two were having.